PR libfortran/49024

	* intrinsics/erfc_scaled.c (erfc_scaled_r16): New function.
	* intrinsics/erfc_scaled_inc.c: Do not provide quadruple
	precision variant.

	* gfortran.dg/erf_3.F90: New file.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205151 138bc75d-0d04-0410-961f-82ee72b054a4